<template>
	<view>
		
		<!-- 使用自定义的搜索组件 -->
		<!-- <my-search :bgcolor="'pink'" :radius="3"></my-search> --><!-- 自定义颜色背景和圆角属性 -->
		<my-search @click="gotosearch"></my-search><!-- 使用默认属性 -->
		
		<view class="scroll-view-container">
			<!-- 左侧滑动区 -->

			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height : wh + 'px'}">
				<block v-for="(item,index) in cateList" :key="index">
					<view :class="['left-scroll-view-item',index === active ? 'active':'']"
						@click="activeChanged(index)">{{item.cat_name}}</view>
				</block>
			</scroll-view>

			<!-- 右侧滑动区 -->

			<scroll-view scroll-y="true" :style="{height : wh + 'px'}" :scroll-top="scrollTop">
				<view v-for="(item,index) in catelevel2" class="cate-lv2" :key="index">
					<view class="cate-lv2-title">{{item.cat_name}}</view>
					<view class="cate-lv3-list">
						<view class="cate-lv3-item" v-for="(item2,index2) in item.children" :key="index2" @click="gotoGoodsList(item2)">
							<image :src="item2.cat_icon"></image>
							<text>{{item2.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	
	import badgeMix from '@/mixins/tabbar-badge.js'
	
	export default {
		mixins:[badgeMix],
		data() {
			return {
				//当前设备可用高度
				wh: 0,
				cateList: [],
				active: 0,
				catelevel2: [],
				scrollTop: 0
			};
		},
		onLoad() {
			const sysinfo = uni.getSystemInfoSync()
			// console.log(sysinfo);
			this.wh = sysinfo.windowHeight - 50
			// console.log(this.wh)

			this.getCateList()
		},
		methods: {
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('api/public/v1/categories')
				if (res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				//为二级分类赋值
				this.catelevel2 = res.message[0].children
			},
			activeChanged(index) {
				this.active = index

				//重新为二级分类赋值
				this.catelevel2 = this.cateList[index].children
				
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			
			//跳转到商品列表页面
			gotoGoodsList(item){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotosearch(){
				// console.log(555);
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;
	}

	.left-scroll-view {
		width: 120px;
	}

	.left-scroll-view-item {
		background-color: #F7F7F7;
		line-height: 60px;
		text-align: center;
		font-size: 12px;

		&.active {
			background-color: #FFFFFF;
			position: relative;

			&::before {
				content: '';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #C00000;
				position: absolute;
				top: 50%;
				left: 0;
				transform: translateY(-50%);
			}
		}
	}

	.cate-lv2-title {
		font-size: 17px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom: 12px;
			
			image{
				width: 60px;
				height: 60px;
			}
			
			text{
				font-size: 12px;
			}
		}
	}
</style>